DANCING WITH THE STARS - REHEARSALS - The winner of six Grammy Awards, Toni Braxton is a Billboard chart-topping singer and actress, selling over 40 million records worldwide. Her U.S. No. 1 hit, "Un-Break My Heart," is the second-biggest single by a female artist in history. She has also appeared in two Disney Broadway shows, "Beauty and the Beast" and Aida." "Dancing with the Stars" marks her return to the spotlight after a six-month health hiatus. She teams up with Season One champion Alec Mazo, who returns for his fourth season. TONI BRAXTON, ALEC MAZO